| 摘要 |
<p>A screw adjustment mechanism with pre-set backlash for an ink fountain blade, includes the adjusting screw (1) threadedly mounting two bushings (3,5) separated by a compression spring (7) which biases the threads of the respective bushings into engagement with opposite sides of the screw thread a desired amount. The biased bushings are each fixed to the fountain blade. The bushings' thread contact with opposite sides of the screw thread effectively eliminates backlash (lost motion), but the contact can be adjusted to provide a desired resistance to screw adjustment.</p> |
